Slitting-cutter for paper-machines.



No. 852,964. PATENTED MAY '7, 1907 0. KOEGEL. SLITTING CUTTER POR'VPAPBR MACHINES;

APPLIGATiON FILED APR. 19.1904.

,To all-whom it may concern:

UNITED STATS PAM on on.

cnARLES KOEGEL, or HOLYOKE, MASSACHUSETTS.

SLITTlNG-CUTTER Foe PAPER-MACHINES.

Specification of Letters Patent.

Patented may 7, 1907. i

' ,applioation filed llpril19,1904, Serial No. 203,892.

Be it known that I, CHARLES, KoEGE'L, a citizen of the United States of America, re-

siding at Holyoke, inthe'county of Hampden and State of Massachusetts, have invented new and useful-Improvements in Slitting-Cutters for Paper-Machines, of which the following is a specification. i

This invention relates to rotary slitting cutters such as'are used onpaper machines to cut the web" of paper into strips of the. desired width. It has heretofore been "c'jstomary to make these rotary slitting cutters slightly concaved forthe'purpose of providing agood cutting edge at the point of contact between the upper and 'underslitters, and the manner of making these cutters has been to concave them and finish them up thGPIOCl LCtiOILOf a ragged edge, in spots, on" The-onlyjmanner of true while in an annealed state, and then.

harden them but it has been found, extremely difii cult, if not impossible, to harden the concaved cutters and have" them come outtriie, they'at times being so badly spring as to render them unfit for nse and even un der mostfavorable circumstances the cutting edge will-be wavy, thisvcondition resulting in the paper being cut. overcoming the defects in the cutter, arising from an uneven cutting edge thereon, has been to press the cutting edges together much harder than is necessary to cause them to op erate-properly, ifthe edge were true, and this has the disadvantage of causing undue wear. j

, The object of the present invention is to provide a slitting cutter which maybe finpiece which may be shifted from the paper ished and hardened flat, and in the provision of means to mount the same on a hub so constructed that in securing the cutter to the latter it may be concaved as much or as little as desired, within certain limits, the cutter and. its hub constituting practically one machine to the arbor ofa grinding machine without disturbing the adjustment of the support on the paper machine and without disturbing the adjustment of the cutter relative to its hub. In other'words, the cutter may be ground on the same axis as that on which it rotates in the papermachine.

The invention is clearly illustrated in the drawings accompanying this application, in Which,Figure 1 is a perspective view of a fixture on which'the upper cutter is supported, the latter being shown in position on said fiXture, and a portion of the'lower cutter be ing also shown. Fig. 2 is a sectional elevation of the upper cutter and the hub on which it is mounted, the latter being shown in position on the stud on which it rotates. Fig. 3 is a perspective view of a cap-forming on the Stud on which it is mounted. The fixture shown in Fig. 1 is that in com; mon use, and it consists in a split collar 0 fit- "ted on a suitable shaft, the collar having a b on one side thereofthrough which a ve i'tical post cextends, and which is vertically and rotatably adjustable therein. In the lower end ofthis post 0 is a stud e secured therein in any suitable manner. Thisfpost andthe stud e are made adjustable-in the manner described to make it possible to adjust the overlapping cutting edges of the slitting cutters f and g, one relative to the other,

f being the upper, and g the lower cutter.

The latter maybe fixedly secured in any desired position on the shaft h, but the upper one fisso mounted on the stud e 'as to be spring-pressed toward the lower one.

part of the means to secure the upper cutter Referring now to Fig. 2, particularly, the v being turned down to provide a shoulder p; v

and over this turned-down end there is fitted a spiral spring g which normally extends beyond the end' of the sleeve and'has a bearing against the shoulder 19: The sleeve is bored out to fit the stud'e on which it may'rotate freely.

Over the end of the Sleeve on which the. spring q is located, the cap 1" (shown in Fig. 3) is fitted, the closedend of the cap beingbored out to fit the stud e, and this close end is provided with the cylindrical flange s having the oppositely located slots t therein. When the cap 1' is fitted over the end of the sleeve, the end of the stud 6 will project therethrough, said end bein slotted and a locking latch u being pivota y mounted in the slot in such manner that it may be swung out axially with the pin as shown in Fig. 2 in dotted lines,to,permit the'cap r to be fitted over the end of the sleeve and then "swung to a position at right angles to its dotted position, as shown, and fitted into theslotst in the flange 8 ofthe cap, thereby lockin the cap to the stud e in a manner to hold t e'spring q under, compression, when the edge of the cutterf bears against theedge of the cutter 9.

On the inner face of the nut 7c there is turned a cylindrical flange i) which fits closely the central perforation in the cutter, and

serves to center the latter, relative to the sleeve, the nut-havin a bearing on the cutter outside -or beyond t 's fiange as shown in said Fig.2. 7' 1 When the cutter isto be secured to its hub, it is'first slipped over the threaded end. of the sleeve/ the nut 7c beingthen screwed on to thelsleieveand the flange 12 entered in the perforation through the cutter. The nut is then turned up as tightly as may be necessary to force in' the center of the cutter, the outer edge ofthe flange m (which is of greater diameterthan the nut 7a,) servingas afulcrum.

, The cutter is mounted and adjusted in the hub before the latter is'secured on the stud e, and the adjustment-0f the parts is such that when so mounted and locked position by the latch u, the edge of" the cutter f will bear to "a proper degree against the edge ,of the cutterg. I It is customary in inountinglthese cutters to provide means to separate their cutting edges if, for any reason,;c'ertain of them are not to be used, a convenient way of efiecting' this separation being .to mount a, slidin' bolt, as w, in therlower end of the post c, and in providing a'cam surface w, on the opposite side-of the post, againstwhich surface the pin ,win the bolt bears, whereby vwhen the bolt is rotated, the end thereof will be forced against the side of the cutterand push it on its stud cent of contact with the cutter g.

By means of the described construction, it is possible to manufacturethe cutters far more economically than inthe manner herefof the United States, 152

tofore employed, and aside from this econ.-

axis as that eration. r I

It will be seen-that there is a tremenduous on which it rotates when in op advantage, in forming a slitting cutter asa s complete, uninterrupted disk or annulus which is punched out fiat, temperedflat, and

ground flat, and aft'r having been dished of:

formed into cupshape', bythe devices herein set forth, it springs back intoflat form as soon as releasedfrom the clamping devices and maybe then reground to give it a new cutting edge, so that'the-entire cutting edge will lie in the se m'e'plane.

Having thus described my invention,what

I claim and desireto secure, by Letters Patent 1. A cutter or knife'formed as a complete uninterrupted annulus having a. single large central opening, and Ineansfor clamping saidcutter or knife in wor ing position and simultaneously dishing the butter or knife-.

2. A cutter or knife formedas a com lete uninterrupted annulus" having a single Farge central opening, a clampinggmernber pro-:-

vided with aprojection eirtending into said single central opening, aysecond clamping member, 'and means to move said clamping member's" 'towardeachother to clamp and dish the said cutter or knife.

' CHARLES KOEGEL.

Witnesses: WM. H. CHAPIN,

K. I. CLEMONs. 

